aboutsummaryrefslogtreecommitdiffstats
path: root/test/packetdrill/checksum.h
diff options
context:
space:
mode:
Diffstat (limited to 'test/packetdrill/checksum.h')
-rw-r--r--test/packetdrill/checksum.h54
1 files changed, 54 insertions, 0 deletions
diff --git a/test/packetdrill/checksum.h b/test/packetdrill/checksum.h
new file mode 100644
index 0000000..43681d2
--- /dev/null
+++ b/test/packetdrill/checksum.h
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+/*
+ * Author: ncardwell@google.com (Neal Cardwell)
+ *
+ * Helpers to calculate IP, TCP, and UDP checksums.
+ */
+
+#ifndef __CHECKSUM_H__
+#define __CHECKSUM_H__
+
+#include "types.h"
+
+#include <netinet/in.h>
+#include <sys/types.h>
+
+/* IPv4 ... */
+
+/* Calculates and returns IPv4 header checksum (in network byte order). */
+extern __be16 ipv4_checksum(void *ip_header, size_t ip_header_bytes);
+
+/* Calculates TCP or UDP checksum for IPv4 (in network byte order). */
+extern __be16 tcp_udp_v4_checksum(struct in_addr src_ip, struct in_addr dst_ip,
+ u8 protocol, const void *payload, u16 len);
+
+/* IPv6 ... */
+
+/* Calculates TCP, UDP, or ICMP checksum for IPv6 (in network byte order). */
+extern __be16 tcp_udp_v6_checksum(const struct in6_addr *src_ip,
+ const struct in6_addr *dst_ip,
+ u8 protocol, const void *payload, u32 len);
+
+/* SCTP ... */
+
+/* Calculates the CRC32C checksum used by SCTP (in network byte order). */
+extern __be32 sctp_crc32c(const void *packet, u32 len);
+
+#endif /* __CHECKSUM_H__ */